プログレッシブ和英中辞典(第4版)の解説
みちづれ【道連れ】
a fellow traveler [passenger]; a traveling companion
道連れになる
(happen to) travel together ((with))/fall in ((with))
旅は道連れ
Traveling is more enjoyable with companions [company] (than alone).
子供を道連れに自殺した
She killed her child and committed suicide./She took her child with her to the next world.